android vector生成svg 修改图片颜色 svg转png java

有时候在客户端使用svg画图，而在服务器端需要同样的图片，在服务器端重新画一遍是非常费事的。这时候我们就可以利用已有的svg直接通过下面的类转换成png格式。

使用这个方法需要引用batic相关的包，maven pom文件如下：

<!-- svg 生成png格式图片  -->
<dependency><groupId>batik</groupId><artifactId>batik-svggen</artifactId><version>1.6</version></dependency>        
<dependency><groupId>batik</groupId><artifactId>batik-awt-util</artifactId><version>1.6</version></dependency>
<dependency><groupId>batik</groupId><artifactId>batik-bridge</artifactId><version>1.6</version></dependency>
<dependency><groupId>batik</groupId><artifactId>batik-css</artifactId><version>1.6</version></dependency>
<dependency><groupId>batik</groupId><artifactId>batik-dom</artifactId><version>1.6</version></dependency>
<dependency><groupId>batik</groupId><artifactId>batik-gvt</artifactId><version>1.6</version></dependency>
<dependency><groupId>batik</groupId><artifactId>batik-parser</artifactId><version>1.6</version></dependency>
<dependency><groupId>batik</groupId><artifactId>batik-script</artifactId><version>1.6</version></dependency>
<dependency><groupId>batik</groupId><artifactId>batik-svg-dom</artifactId><version>1.6</version></dependency>
<dependency><groupId>batik</groupId><artifactId>batik-transcoder</artifactId><version>1.6</version></dependency>
<dependency><groupId>batik</groupId><artifactId>batik-util</artifactId><version>1.6</version></dependency>
<dependency><groupId>batik</groupId><artifactId>batik-xml</artifactId><version>1.6</version></dependency>
<!-- 此处不能使用2.9.1版本，使用2.9.1生成png会失败 -->
<dependency><groupId>xerces</groupId><artifactId>xercesImpl</artifactId><version>2.5.0</version></dependency>
<dependency><groupId>xml-apis</groupId><artifactId>xmlParserAPIs</artifactId><version>2.0.2</version></dependency>

 <dependency><groupId>org.axsl.org.w3c.dom.svg</groupId><artifactId>svg-dom-java</artifactId><version>1.1</version></dependency>
 <dependency><groupId>xml-apis</groupId>    <artifactId>xml-apis</artifactId><version>2.0.0</version></dependency>

 <dependency><groupId>org.w3c.css</groupId> <artifactId>sac</artifactId>    <version>1.3</version></dependency>
<!-- svg 生成png格式图片结束  -->

package cn.outofmemory.util;

import java.io.ByteArrayInputStream;
import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.OutputStream;

import org.apache.batik.transcoder.TranscoderException;
import org.apache.batik.transcoder.TranscoderInput;
import org.apache.batik.transcoder.TranscoderOutput;
import org.apache.batik.transcoder.image.PNGTranscoder;

/**
 * 将svg转换为png格式的图片
 * 
 * 
 */
public abstract class SvgPngConverter {

    /**
     * 将svg字符串转换为png
     * 
     * @param svgCode svg代码
     * @param pngFilePath 保存的路径
     * @throws TranscoderException svg代码异常
     * @throws IOException io错误
     */
    public static void convertToPng(String svgCode, String pngFilePath) throws IOException,
            TranscoderException {

        File file = new File(pngFilePath);

        FileOutputStream outputStream = null;
        try {
            file.createNewFile();
            outputStream = new FileOutputStream(file);
            convertToPng(svgCode, outputStream);
        } finally {
            if (outputStream != null) {
                try {
                    outputStream.close();
                } catch (IOException e) {
                    e.printStackTrace();
                }
            }
        }
    }

    /**
     * 将svgCode转换成png文件，直接输出到流中
     * 
     * @param svgCode svg代码
     * @param outputStream 输出流
     * @throws TranscoderException 异常
     * @throws IOException io异常
     */
    public static void convertToPng(String svgCode, OutputStream outputStream)
            throws TranscoderException, IOException {
        try {
            byte[] bytes = svgCode.getBytes("utf-8");
            PNGTranscoder t = new PNGTranscoder();
            TranscoderInput input = new TranscoderInput(new ByteArrayInputStream(bytes));
            TranscoderOutput output = new TranscoderOutput(outputStream);
            t.transcode(input, output);
            outputStream.flush();
        } finally {
            if (outputStream != null) {
                try {
                    outputStream.close();
                } catch (IOException e) {
                    e.printStackTrace();
                }
            }
        }
    }
}